Bump hacking to 0.8

[Sergio Cazzolato]

Due to Bump hacking dependency is not the 0.8, some compatibility checks with python 3.x are not being done on gate and it is bringing code issues.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/59725

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/59725
Committed: https://git.openstack.org/cgit/openstack/glance/commit/?id=2eca65eb5febae59eaca9e949ecd6a6f9492350a
Submitter: Jenkins
Branch: master

commit 2eca65eb5febae59eaca9e949ecd6a6f9492350a
Author: Sergio Cazzolato <email address hidden>
Date: Fri Nov 29 17:23:47 2013 -0500

    Bump hacking to 0.8 and get python 3.x compatibility

    Bump hacking dependency to 0.8 to get python 3.x compatibility
    Fixes done in order to avoid errors after enabling hacking 0.8

    Change-Id: Ic878fe2e1bd3f65f7f95a9b5c7a192dac81b749d
    Closes-Bug: #1257282